Abstract
Sequential recommendation, which aims to recommend next item that the user will likely interact in
a near future, has become essential in various Internet applications. Existing methods usually consider
the transition patterns between items, but ignore the
transition patterns between features of items. We
argue that only the item-level sequences cannot reveal the full sequential patterns, while explicit and
implicit feature-level sequences can help extract the
full sequential patterns. In this paper, we propose
a novel method named Feature-level Deeper SelfAttention Network (FDSA) for sequential recommendation. Specifically, FDSA first integrates various heterogeneous features of items into feature sequences with different weights through a vanilla attention mechanism. After that, FDSA applies separated self-attention blocks on item-level sequences
and feature-level sequences, respectively, to model
item transition patterns and feature transition patterns. Then, we integrate the outputs of these two
blocks to a fully-connected layer for next item recommendation. Finally, comprehensive experimental results demonstrate that considering the transition relationships between features can significantly improve the performance of sequential recommendation